I have a Plantronics/Frederick Model 702 "Converter" which is also labeled as as Collins CPN270-0381-010 and a CV-3388/USC-14(V). Does anyone have any idea what it might be? It is TTY related, and could possibly be a Baudot-to-ASCII converter. It's a 3 1/2-inch rackmount unit with around 8 plug-in boards. Thanks and 73, Jack WA2HWJ NNNN